کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
2024644 1542605 2014 9 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Effects of sulfate deposition on pore water dissolved organic carbon, nutrients, and microbial enzyme activities in a northern peatland
ترجمه فارسی عنوان
اثرات رسوبدهی سولفات بر کربن آلی محلول در آب معدنی، مواد مغذی و فعالیت آنزیم های میکروبی در سرزمین های شمالی
کلمات کلیدی
موضوعات مرتبط
علوم زیستی و بیوفناوری علوم کشاورزی و بیولوژیک دانش خاک شناسی
چکیده انگلیسی


• We compare the chemistry and microbial enzymes of sulfate-amended peat to controls.
• Additions of S decreased DOC concentration and increased DOC aromaticity.
• Changes in phosphorus may have shifted the system from P to N limitation.
• Recovery from past sulfate amendments may take longer than first hypothesized.

Export of dissolved organic carbon from lakes and streams has increased throughout Europe and North America over the past several decades. One possible cause is altered deposition chemistry; specifically, decreasing sulfate inputs leading to changes in ionic strength and dissolved organic carbon solubility. To further investigate the relationship between deposition chemistry and dissolved organic carbon export in peatlands, a field experiment was conducted to compare the pore water chemistry and peat microbial enzyme activity of mesocosms receiving sulfate amendments to mesocosms receiving no additions. To consider how peatlands respond during recovery from increased inputs of sulfate, samples were also analyzed from an area of the same peatland that was previously amended with sulfate. Current additions of sulfate decreased dissolved organic carbon concentration and increased dissolved organic carbon aromaticity. Total dissolved phosphorus decreased in response to current sulfate amendments but was elevated in the area of the peatland recovering from sulfate amendment. The total dissolved phosphorus increase, which was reflected in microbial enzyme activity, may have shifted the system from P limitation to N limitation. This shift could have important consequences for ecosystem processes related to plant and microbial communities. It also suggests that the recovery from previous sulfate amendments may take longer than may be expected.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Soil Biology and Biochemistry - Volume 79, December 2014, Pages 91–99
نویسندگان
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